Attachment foe sewing- machines



.(No Model.) 2 Sheets-Sheet 1.

O. HOSOH. BOBBIN WINDING ATTAGHMBNTPOR SEWING MACHINES.

No. 311,988. Patented'Feb. 10,1885.

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2 sheets -Sheet 2.

(No Model.) I

- '0. HOSOI-I.

I BOBBIN WINDING ATTACHMENT FOR SEWING MACHINES.

No. 311,988. Patented f'eb. 10, 1885;

N I WW' WITNESSES: 'INVBN I UNITED STATES PATENT OFFICE.

CARL HOSGH, OF HAIDA, AUSTRIATIUN GARY.

BOBBlN-WINDING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 311,988, dated February 10, 1885.

Application filed July 19, 1884. (No model.)

To all whom it may concern:

Be it known that I, CARL HosoH, a subject of the Emperor of Austria-Hungary, residing at the city of Haida, in the Empire of Austria-Hungary, have invented certain new and useful Improvements in Bobbin-Winding Attachments for Sewing-Machines, of which the following is a specification.

This invention has reference to an improved bobbin-winding attachment for sewing-mm chines; and it consists of means by which the bobbin-spindle is attached to the upper shaft or flywheel of the sewing-machine in line with the axis of said shaft, and of a threadguide supported back of the bobbin-spindle.

In the accompanying drawings, Figure 1 represents a sectional elevation of my improved bobbin winding attachment for sewing machines. Fig. 2 is an end view of the same. Figs. 3 and 4 are detail vertical sections of the attachment, showing the connection of the bobbin-spindle with the upper shaft of the sewing-machine. Fig. 5 is a side elevation of a modified form of bobbin-winding sponding parts.

In the drawings, a represents a cylindrical supporting piece, which is screwed by its threaded end b into the end of the upper drivingshaft, d, of the machine. The outer end of the supporting-piece a is provided with a screw-socket, into which the threaded end of the bobbin-spindle e is inserted. The supportingpiece a is of such a length that it extends beyond the fly-wheel' f, so as to keep the thread clear of the fly-wheel. The support ing-piece a is fitted accurately into line with the axis of the upper driving-shaft, d. The thread is wound up on the bobbin-spindle by turning the upper shaft, (1, from the lower crank-shaft in the usual manner.

The construction shown in detail in Figs. 3 and 4 is specially adapted for old styles of sewing-machines.

In new styles of sewing-machines, in which the fly-wheel f can be uncoupled from the driving-shaft d, the bobbin-spindle e is supported on a diametrical yoke-shaped piece,

a, which is attached by screws a to the arms of the fly-wheel, as shown in Figs. 6 and 7. The bobbin-spindle e is screwed into the yokeshaped piece a; but it can also be retained in the same-by any other equivalent locking device, in which case the ends of the bobbinspindle are not made threaded, but square.

At some distance back of the spindle e is located a recessed thread-guide, 9, having a convex edge, 9 as shown clearly in Fig. 1. The thread-guide g is supported either on a vertical pillar, h, that is secured to the table of the sewing-machine, as shown in Figs. 1 and 2, or at the end of a yoke, k, which is attached to the guard-flange i of the drivingbelt of the upper shaft, 61, as shown in Fig. 5. The thread is conducted from the spool m,

supported on a pin of the upper arm of the machine, through an eye, a, to a tension de vice, 9, above the thread-guide, then back of the supporting-arm of the thread-guide g to the lower recessed convex edge, of the same, and then forward to the bobbinspindle, as shown clearly in Figs. 1, 2, and 5. The thread passes, while being wound up 011 the bobbin-spindle, from one side to the other and back along the convex edge g, whereby it is uniformly distributed over the bobbin.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with the driving-shaft of a sewing-machine, of a bobbin having an elongated spindle, a socketpiece supporting said bobbin in line with the axis of said shaft, and connected to said shaft, asuitable threadguide, and a tension device, substantially as described.

2. The combination, with the driving-shaft of a sewing-machine provided with a sockethole at one end, of a socket-piece inserted in said socket-hole in line with the axis of the shaft, a bobbin provided with an extended spindle, one end of which is inserted in said socket-piece, said bobbin being supported in line with the axis of said shaft, a thread-guide, and a tension device, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

I CARL HOSGH.

Witnesses:

G. E. WISOHKE, PAUL DRUOKMULLEE,

ICO 

